20951525700 has 216 divisors, whose sum is σ = 78316737408. Its totient is φ = 4580674560.

The previous prime is 20951525659. The next prime is 20951525711. The reversal of 20951525700 is 752515902.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 72604 + ... + 217196.

It is an arithmetic number, because the mean of its divisors is an integer number (362577488).

Almost surely, 2^20951525700 is an apocalyptic number.

20951525700 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 20951525700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39158368704).

20951525700 is an abundant number, since it is smaller than the sum of its proper divisors (57365211708).

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

20951525700 is a wasteful number, since it uses less digits than its factorization.

20951525700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144643 (or 144633 counting only the distinct ones).

The product of its (nonzero) digits is 31500, while the sum is 36.

The spelling of 20951525700 in words is "twenty billion, nine hundred fifty-one million, five hundred twenty-five thousand, seven hundred".