20430954 has 44 divisors (see below), whose sum is σ = 46235106. Its totient is φ = 6770952.

The previous prime is 20430941. The next prime is 20430973. The reversal of 20430954 is 45903402.

It can be written as a sum of positive squares in only one way, i.e., 13286025 + 7144929 = 3645^2 + 2673^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 21 ways as a sum of consecutive naturals, for example, 118012 + ... + 118184.

Almost surely, 2^20430954 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20430954, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23117553).

20430954 is an abundant number, since it is smaller than the sum of its proper divisors (25804152).

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

20430954 is an frugal number, since it uses more digits than its factorization.

20430954 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205 (or 178 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 20430954 is about 4520.0612827704. The cubic root of 20430954 is about 273.3775719923.

The spelling of 20430954 in words is "twenty million, four hundred thirty thousand, nine hundred fifty-four".