20531074389930 has 256 divisors, whose sum is σ = 60192865152000. Its totient is φ = 4949173232640.

The previous prime is 20531074389923. The next prime is 20531074389941. The reversal of 20531074389930 is 3998347013502.

20531074389930 is a `hidden beast` number, since 2 + 0 + 531 + 0 + 74 + 3 + 8 + 9 + 9 + 30 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 36855832 + ... + 37408748.

It is an arithmetic number, because the mean of its divisors is an integer number (235128379500).

Almost surely, 2^{20531074389930} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20531074389930, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30096432576000).

20531074389930 is an abundant number, since it is smaller than the sum of its proper divisors (39661790762070).

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

20531074389930 is a wasteful number, since it uses less digits than its factorization.

20531074389930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 553166 (or 553160 counting only the distinct ones).

The product of its (nonzero) digits is 4898880, while the sum is 54.

The spelling of 20531074389930 in words is "twenty trillion, five hundred thirty-one billion, seventy-four million, three hundred eighty-nine thousand, nine hundred thirty".