20258503770 has 32 divisors (see below), whose sum is σ = 48834612288. Its totient is φ = 5378467328.

The previous prime is 20258503757. The next prime is 20258503801. The reversal of 20258503770 is 7730585202.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1480599 + ... + 1494218.

It is an arithmetic number, because the mean of its divisors is an integer number (1526081634).

Almost surely, 2^20258503770 is an apocalyptic number.

20258503770 is an abundant number, since it is smaller than the sum of its proper divisors (28576108518).

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

20258503770 is a wasteful number, since it uses less digits than its factorization.

20258503770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2975054.

The product of its (nonzero) digits is 117600, while the sum is 39.

The spelling of 20258503770 in words is "twenty billion, two hundred fifty-eight million, five hundred three thousand, seven hundred seventy".