20870651582 has 32 divisors (see below), whose sum is σ = 35649469440. Its totient is φ = 9070981920.

The previous prime is 20870651561. The next prime is 20870651591. The reversal of 20870651582 is 28515607802.

It is a super-3 number, since 3×20870651582³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

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, 1929044 + ... + 1939832.

It is an arithmetic number, because the mean of its divisors is an integer number (1114045920).

Almost surely, 2^20870651582 is an apocalyptic number.

20870651582 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20870651582 is a deficient number, since it is larger than the sum of its proper divisors (14778817858).

20870651582 is a wasteful number, since it uses less digits than its factorization.

20870651582 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14648.

The product of its (nonzero) digits is 268800, while the sum is 44.

The spelling of 20870651582 in words is "twenty billion, eight hundred seventy million, six hundred fifty-one thousand, five hundred eighty-two".