20401052070 has 64 divisors (see below), whose sum is σ = 56016437760. Its totient is φ = 4658158848.

The previous prime is 20401052059. The next prime is 20401052143. The reversal of 20401052070 is 7025010402.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 149161 + ... + 251099.

It is an arithmetic number, because the mean of its divisors is an integer number (875256840).

Almost surely, 2^20401052070 is an apocalyptic number.

20401052070 is an abundant number, since it is smaller than the sum of its proper divisors (35615385690).

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

20401052070 is a wasteful number, since it uses less digits than its factorization.

20401052070 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102909.

The product of its (nonzero) digits is 560, while the sum is 21.

Adding to 20401052070 its reverse (7025010402), we get a palindrome (27426062472).

The spelling of 20401052070 in words is "twenty billion, four hundred one million, fifty-two thousand, seventy".