20929948 has 24 divisors (see below), whose sum is σ = 40007520. Its totient is φ = 9522240.

The previous prime is 20929939. The next prime is 20929957. The reversal of 20929948 is 84992902.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20929939) and next prime (20929957).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 858 + ... + 6526.

It is an arithmetic number, because the mean of its divisors is an integer number (1666980).

Almost surely, 2^20929948 is an apocalyptic number.

It is an amenable number.

20929948 is a deficient number, since it is larger than the sum of its proper divisors (19077572).

20929948 is a wasteful number, since it uses less digits than its factorization.

20929948 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5757 (or 5755 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 43.

The square root of 20929948 is about 4574.9260103307. The cubic root of 20929948 is about 275.5853010389.

The spelling of 20929948 in words is "twenty million, nine hundred twenty-nine thousand, nine hundred forty-eight".