20746152924 has 72 divisors (see below), whose sum is σ = 56369392128. Its totient is φ = 5921324640.

The previous prime is 20746152913. The next prime is 20746152979. The reversal of 20746152924 is 42925164702.

It is a happy number.

It is a super-2 number, since 2×20746152924² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 564907 + ... + 600509.

It is an arithmetic number, because the mean of its divisors is an integer number (782908224).

Almost surely, 2^20746152924 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20746152924, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28184696064).

20746152924 is an abundant number, since it is smaller than the sum of its proper divisors (35623239204).

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

20746152924 is a wasteful number, since it uses less digits than its factorization.

20746152924 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36615 (or 36606 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 42.

The spelling of 20746152924 in words is "twenty billion, seven hundred forty-six million, one hundred fifty-two thousand, nine hundred twenty-four".