21024611654 has 16 divisors (see below), whose sum is σ = 33447074688. Its totient is φ = 9877625472.

The previous prime is 21024611609. The next prime is 21024611659. The reversal of 21024611654 is 45611642012.

It is a self number, because there is not a number n which added to its sum of digits gives 21024611654.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21024611659) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 488729 + ... + 530004.

It is an arithmetic number, because the mean of its divisors is an integer number (2090442168).

Almost surely, 2^21024611654 is an apocalyptic number.

21024611654 is a deficient number, since it is larger than the sum of its proper divisors (12422463034).

21024611654 is a wasteful number, since it uses less digits than its factorization.

21024611654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1019359.

The product of its (nonzero) digits is 11520, while the sum is 32.

The spelling of 21024611654 in words is "twenty-one billion, twenty-four million, six hundred eleven thousand, six hundred fifty-four".