20739000 has 128 divisors (see below), whose sum is σ = 67092480. Its totient is φ = 5328000.

The previous prime is 20738999. The next prime is 20739023. The reversal of 20739000 is 93702.

It is a super-2 number, since 2×20739000² = 860212242000000, which contains 22 as substring.

It is a hoax number, since the sum of its digits (21) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 92889 + ... + 93111.

It is an arithmetic number, because the mean of its divisors is an integer number (524160).

Almost surely, 2^20739000 is an apocalyptic number.

20739000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20739000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33546240).

20739000 is an abundant number, since it is smaller than the sum of its proper divisors (46353480).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20739000 is a wasteful number, since it uses less digits than its factorization.

20739000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278 (or 264 counting only the distinct ones).

The product of its (nonzero) digits is 378, while the sum is 21.

The square root of 20739000 is about 4554.0092226521. The cubic root of 20739000 is about 274.7446665814.

The spelling of 20739000 in words is "twenty million, seven hundred thirty-nine thousand".